Publikationsdatenbank

A comparison of DNA extraction protocols from blood spotted on FTA cards for the detection of tick-borne pathogens by Reverse Line Blot hybridization (2017)

Art

Zeitschriftenartikel / wissenschaftlicher Beitrag

Autoren

Hailemariam, Zerihun (WE 13)

Ahmed, Jabbar Sabir (WE 13)

Clausen, Peter-Henning (WE 13)

Nijhof, Ard Menzo (WE 13)

Forschungsprojekt

Molecular epidemiology network for promotion and support of delivery of live vaccines against Theileria parva and Theileria annulata infection in Eastern and Northern Africa

Quelle

Ticks and tick-borne diseases

Bandzählung: 8

Heftzählung: 1

Seiten: 185 – 189

ISSN: 1877-959x

Sprache

Englisch

Verweise

DOI: 10.1016/j.ttbdis.2016.10.016

Pubmed: 27825733

Kontakt

Institut für Parasitologie und Tropenveterinärmedizin

Robert-von-Ostertag-Str. 7-13
14163 Berlin
+49 30 838 62310
parasitologie@vetmed.fu-berlin.de

Abstract / Zusammenfassung

An essential step in the molecular detection of tick-borne pathogens (TBPs) in blood is the extraction of DNA. When cooled storage of blood under field conditions prior to DNA extraction in a dedicated laboratory is not possible, the storage of blood on filter paper forms a promising alternative. We evaluated six DNA extraction methods from blood spotted on FTA Classic(®) cards (FTA cards), to determine the optimal protocol for the subsequent molecular detection of TBPs by PCR and the Reverse Line Blot hybridization assay (RLB). Ten-fold serial dilutions of bovine blood infected with Babesia bovis, Theileria mutans, Anaplasma marginale or Ehrlichia ruminantium were made by dilution with uninfected blood and spotted on FTA cards. Subsequently, DNA was extracted from FTA cards using six different DNA extraction protocols. DNA was also isolated from whole blood dilutions using a commercial kit. PCR/RLB results showed that washing of 3mm discs punched from FTA cards with FTA purification reagent followed by DNA extraction using Chelex(®) resin was the most sensitive procedure. The detection limit could be improved when more discs were used as starting material for the DNA extraction, whereby the use of sixteen 3mm discs proved to be most practical. The presented best practice method for the extraction of DNA from blood spotted on FTA cards will facilitate epidemiological studies on TBPs. It may be particularly useful for field studies where a cold chain is absent.